# Geysers Unit 5-20

CAISO asset profile · https://askthegrid.com/assets/facilities/geysers-unit-5-20

Geysers Power Company, LLC - Sonoma County - CAISO

The EIA-anchored Geysers Unit 5-20 profile aggregates 12 geothermal generators in Sonoma County with 1,236 MW of nameplate capacity. Geysers Power Company is part of Calpine, which Constellation acquired in January 2026.

## Metrics

- **Nameplate capacity:** 1,236 MW — Canonical EIA plant baseline.
- **Registry anchor:** Plant 286 — plant-286

## Facts

- **Technology:** Geothermal
- **Operator:** Geysers Power Company, LLC

## Related parties

- **Operator:** Calpine LLC — operating parent company ([source](https://www.calpine.com/))
- **Investor:** Constellation Energy Corporation — ultimate parent company ([source](https://www.constellationenergy.com/))

## Sources

- [calpine.com](http://calpine.com/clean-and-reliable-power/our-assets/geothermal) — calpine.com · public_source — Source retained for exact-record publication review.
- [mbrweb.ferc.gov](http://mbrweb.ferc.gov/SearchMBRAssetAppendix/AssetAppendixDetails?AssetAppendixId=11507) — mbrweb.ferc.gov · authoritative — Source retained for exact-record publication review.
- [efiling.energy.ca.gov](https://efiling.energy.ca.gov/Lists/DocketLog.aspx?docketnumber=79-AFC-03C) — efiling.energy.ca.gov · authoritative — Source retained for exact-record publication review.
- [geysers.com](https://geysers.com/history-of-the-geysers/) — geysers.com · public_source — Source retained for exact-record publication review.

---

Canonical page: https://askthegrid.com/assets/facilities/geysers-unit-5-20
Website: [Geysers Power Company, LLC](https://geysers.com/)

Source: Ask the Grid — https://askthegrid.com/